Dishwasher filter device based on micro-nano aeration

ABSTRACT

A dishwasher filter device based on micro-nano aeration includes a cylinder for accommodating washing liquid and a filter unit. The filter unit is in communication with an inner cavity of the cylinder by a water inlet pipe. The filter unit is connected to a micro-nano bubble generator by a third pipe. The micro-nano bubble generator is connected to a water outlet unit. The water outlet unit includes a fourth pipe connected to the micro-nano bubble generator and a dissolved air release assembly connected to the other end of the fourth pipe. The dissolved air release assembly is disposed at a bottom of the cylinder.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application is a national stage filing under 35 U.S.C. § 371 of international application number PCT/CN2018/099800, filed Aug. 10, 2018, which claims priority to Chinese patent application No. 201810355376.2 filed Apr. 19, 2018. The contents of these applications are incorporated herein by reference in their entirety.

TECHNICAL FIELD

The present disclosure relates to the field of dishwasher technology, and in particular, to a dishwasher filter device based on micro-nano aeration.

BACKGROUND

At present, home dishwashers generally use water spray for cleaning. However, this type of dishwashers, on one hand, is difficult to clean ordinary Chinese tableware due to the problem of water spray angle, and on the other hand, has a poor cleaning effect since the cleaning liquid is in contact with tableware for a short time after being sprayed. In addition, dishwashing powder specially used in the dishwashers is very expensive, resulting in a relatively high cost to use. In view of this, the water-spray dishwashers have not been popularized in Chinese families.

Immersion-type dishwashers have not been used in families for various reasons either. One reason is that when the dishwasher uses water for immersed tableware cleaning, since a large amount of food residues are attached to the surface of tableware, the food residues may enter and float on the cleaning water. Thus, current filter devices cannot satisfy the requirements for cleaning. Another reason is that, such ultrasound-based dishwashers have noise problems, generate ultrasound that is potentially hazardous to human health, and are not inadequate in cleaning effect, therefore they are not widely applied in Chinese families.

SUMMARY

An objective of the present disclosure is to provide a dishwasher filter device based on micro-nano aeration which can avoid secondary pollution of tableware by food residues and floating oil on the tableware during a cleaning process, and at the same time, can also help improve the tableware cleaning effect of the dishwasher and reduce the use of chemical detergents.

The technical solutions adopted for solving the above technical problems are described as follows.

There is provided a dishwasher filter device based on micro-nano aeration including a cylinder for accommodating washing liquid, and a filter unit, wherein the filter unit is in communication with an inner cavity of the cylinder by a water inlet pipe and is connected to a micro-nano bubble generator by a third pipe, the micro-nano bubble generator is connected to a water outlet unit which includes a fourth pipe connected to the micro-nano bubble generator and a dissolved air release assembly connected to the other end of the fourth pipe, and the dissolved air release assembly is disposed at a bottom of the cylinder.

As a further improvement to the foregoing technical solution, the filter unit includes a water inlet cavity and a water outlet cavity that are in communication with each other, and the water inlet cavity is provided with a filter material.

As a further improvement to the foregoing technical solution, the filter unit further includes a filter tank with an open upper end, the water inlet cavity and the water outlet cavity are disposed in the filter tank, and the filter material includes a coarse filter screen and a fine filter screen located below the coarse filter screen.

As a further improvement to the foregoing technical solution, an oil-water separation tank is provided between the water inlet cavity and the water outlet cavity, an oil storage box is disposed in the oil-water separation tank, and an oil discharge valve is connected to the oil storage box.

As a further improvement to the foregoing technical solution, the filter unit further includes a sealed container, the water inlet cavity is disposed at an upper portion of the sealed container, the water outlet cavity is disposed at a lower portion of the sealed container, and the water inlet cavity includes a water storage chamber in communication with the water inlet pipe and a filter material chamber in communication with the water storage chamber.

As a further improvement to the foregoing technical solution, the micro-nano bubble generator includes an air buffer tank, an air-liquid mixing pump connected to the water inlet pipe, and a jet device connected to a water outlet of the air-liquid mixing pump, the air buffer tank is respectively connected to an air inlet of the air-liquid mixing pump and an air inlet of the jet device, and a water outlet of the jet device is connected to the water outlet unit.

As a further improvement to the foregoing technical solution, the dissolved air release assembly includes an intercommunication pipe in mutual communication and a dissolved air releaser connected to the intercommunication pipe, the dissolved air releaser includes an inlet pipe and an outlet pipe connected to the inlet pipe, a conical entrance cavity is formed inside the inlet pipe, an exit cavity in communication with the entrance cavity is formed inside the outlet pipe, and a conical lug is provided on an inner wall of the outlet pipe at a position facing the entrance cavity.

As a further improvement to the foregoing technical solution, the dishwasher filter device further includes a rotation driving device for driving washing liquid to flow, wherein the rotation driving device includes a first motor disposed below the cylinder, a reducer connected to the first motor by a transmission mechanism, and an impeller connected to an output end of the reducer, and the impeller is disposed between a bottom wall of the cylinder and the dissolved air release assembly.

As a further improvement to the foregoing technical solution, the impeller includes a first disk and a plurality of ribs disposed on the first disk, each rib is in a ridge form or a propeller vane form and a C shape or an S shape in a radial direction of the first disk, and the plurality of the ribs are uniformly distributed in a circumferential direction of the first disk.

As a further improvement to the foregoing technical solution, the dishwasher filter device further includes a dish rack immersed in washing liquid and a vibration drive device for driving the dish rack to reciprocate linearly, where the vibration drive device includes a second motor and a sine mechanism that are mounted outside a side wall of the cylinder, the sine mechanism includes a second disk mounted on an output shaft of the second motor, a lug disposed at an edge of the second disk, a shift fork with an opening groove sheathed on the lug, and a horizontal transmission rod vertically connected to the shift fork, and the horizontal transmission rod is connected to the dish rack by a plurality of vertical rods.

The present disclosure has the following beneficial effects. In the present disclosure, the filter unit filters washing liquid in the cylinder. The micro-nano bubble generator introduces micro-nano bubbles into the filtered washing liquid. The washing liquid that contains the micro-nano bubbles passes through the dissolved air release assembly to release a large number of micro-nano bubbles. The micro-nano bubbles then rise slowly and reach the surface of tableware. The tableware is cleaned by the shock waves generated as some micro-nano bubbles burst on the surface of the tableware. Some micro-nano bubbles can adsorb grease and carry the grease to rise to the surface of the washing liquid to turn the grease into floating oil. The washing liquid that contains residues and floating oil passes through the water inlet pipe and is introduced into the filter unit again for filtration. According to the present disclosure, the filtration of washing liquid that contains residues and floating oil is realized, and the amount of detergent used is reduced. Moreover, the micro-nano bubble generator is used to aerate the filtered washing liquid, and the tableware can be cleaned by the aerated washing liquid. In the present disclosure, a cyclic process of washing the tableware and filtering washing liquid is completed, and the washing liquid can be effectively filtered to remove residues and floating oil and the tableware can be cleaned.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to illustrate the technical solution in the embodiments of the present disclosure more clearly, brief description will be made below to the drawings required in the embodiments, and apparently, the drawings described below are some embodiments of the present disclosure only, and other drawings could be obtained based on these drawings by those of ordinary skill in the art without creative efforts.

FIG. 1 is a schematic structural diagram according to a first embodiment of the present disclosure;

FIG. 2 is a schematic structural diagram according to a second embodiment of the present disclosure;

FIG. 3 is a schematic diagram of a first structure of a filter unit in the present disclosure;

FIG. 4 is a schematic diagram of a second structure of a filter unit in the present disclosure;

FIG. 5 is a schematic diagram of a third structure of a filter unit in the present disclosure;

FIG. 6 is a schematic diagram of a fourth structure of a filter unit in the present disclosure;

FIG. 7 is a schematic diagram of a first structure of a filter unit in the present disclosure;

FIG. 8 is a schematic structural diagram of a dissolved air release assembly in the present disclosure;

FIG. 9 is a sectional view of a dissolved air releaser in the present disclosure;

FIG. 10 is a schematic diagram of a first structure of a dissolved air releaser in the present disclosure;

FIG. 11 is a schematic diagram of a second structure of a dissolved air releaser in the present disclosure; and

FIG. 12 is a schematic structural diagram of a micro-nano bubble generator in the present disclosure.

DETAILED DESCRIPTION

The concept, specific structures, and produced technical effects of the present disclosure are clearly and thoroughly described below with reference to the embodiments and the accompanying drawings for thorough understanding of the objectives, features, and effects of the present disclosure. Apparently, the described embodiments are merely some rather than all of the embodiments of the present disclosure. Other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present disclosure without creative efforts shall fall within the protection scope of the present disclosure. In addition, all coupling/connection relationships mentioned herein are not necessarily direct connection between members. Instead, coupling auxiliaries may be added or reduced according to specific implementations to form better coupling structures.

FIG. 1 and FIGS. 3 to 12 show a first embodiment of the present disclosure. A dishwasher filter device based on micro-nano aeration includes a cylinder 12 for accommodating washing liquid and a filter unit 2. The cylinder 12 is placed inside a housing 11 of a dishwasher. The filter unit 2 is in communication with an inner cavity of the cylinder 12 by a water inlet pipe. The water inlet pipe includes a first water discharge pipe 81 in communication with the bottom of the inner cavity of the cylinder 12 and a second water discharge pipe 82 in communication with an upper portion of the inner cavity of the cylinder 12. Two residue suction ports are formed by means of the first water discharge pipe 81 and the second water discharge pipe 82. The residue suction port located at the bottom of the inner cavity of the cylinder 12 sucks washing liquid that contains deposited residues. The residue suction port located at the upper portion of the inner cavity of the cylinder 12 sucks washing liquid that contains floating residues and floating oil. The filter unit then removes residues. The residue suction port of the second water discharge pipe 82 is preferably located at a water level of the washing liquid. The filter unit 2 is connected to a micro-nano bubble generator 7 by a third pipe 83. The micro-nano bubble generator 7 is connected to a water outlet unit. The water outlet unit includes a fourth pipe 84 connected to the micro-nano bubble generator 7 and a dissolved air release assembly 3 connected to the other end of the fourth pipe 84. The dissolved air release assembly 3 is disposed at the bottom of the cylinder 12.

The micro-nano bubble generator 7 includes an air buffer tank 72, an air-liquid mixing pump 71 connected to the third pipe 83, and a jet device 73 connected to a water outlet of the air-liquid mixing pump 71. The air buffer tank 72 is respectively connected to an air inlet of the air-liquid mixing pump 71 and an air inlet of the jet device 73. A water outlet of the jet device 73 is connected to the water outlet unit. The air-liquid mixing pump 71 is further connected to a fifth pipe 85. The fifth pipe 85 may introduce tap water. The fifth pipe 85 is provided with a second control valve 87. The third pipe 83 is provided with a first control valve 86.

FIG. 3 shows a first structure of the filter unit 2. The filter unit 2 includes a water inlet cavity 21 and a water outlet cavity 23 that are in communication with each other. The water inlet cavity 21 is provided with a filter material 25. The filter unit 2 further includes a filter tank with an open upper end, the water inlet cavity 21 and the water outlet cavity 23 are provided in the filter tank, and the filter tank is disposed below the cylinder 12. In addition, an oil-water separation tank 22 is further provided between the water inlet cavity 21 and the water outlet cavity 23. A lower portion of the water inlet cavity 21 is in communication with a lower portion of the oil-water separation tank 22. The water outlet cavity 23 and the oil-water separation tank 22 are in communication with each other by a water level control channel. Specifically, a lower portion of the water level control channel is in communication with the oil-water separation tank 22, an upper portion of the water level control channel is in communication with the water outlet cavity 23, and the third pipe 83 is in communication with the water outlet cavity 23. In addition, an oil storage box 29 is disposed at an upper portion of the oil-water separation tank 22. An oil discharge valve is connected to the oil storage box 29. The filter material 25 includes a coarse filter screen 251 and a fine filter screen 252 located below the coarse filter screen 251. Washing liquid that contains residues or grease flows into the water inlet cavity 21 via the water inlet pipe, is sequentially filtered by the coarse filter screen 251 and the fine filter screen 252, and then flows from the lower portion of the water inlet cavity 21 to the oil-water separation tank 22. In the oil-water separation tank 22, grease floats on the surface of the washing liquid. That is, floating oil flows into the oil storage box 29 along an upper edge of a side wall of the oil storage box 29, so that grease can be discharged through the oil discharge valve. The washing liquid flows into the water level control channel through the lower portion of the oil-water separation tank 22, and then overflows to the water outlet cavity 23 from above the water level control channel. Further, the water inlet pipe is provided with a water level control valve 24. When the water level of the water inlet cavity 21 reaches a limit value, a switch of the water level control valve 24 is touched, a flowing port of the water level control valve 24 is closed to prevent the washing liquid from the water inlet cavity 21 from overflowing or avoid an excessively small amount of washing liquid in the cylinder 12. The limit value of the water level of the water inlet cavity 21 is preferably set as corresponding to a plane where the upper edge of the side wall of the oil storage box 29 is located.

FIG. 4 shows a second structure of the filter unit 2, which is different from the first structure in that the filter tank is disposed above the cylinder 12. That is, the highest position of the water inlet pipe is higher than the water level of the washing liquid in the cylinder 12. The washing liquid cannot freely flow into the water inlet cavity 21 under the effect of gravity, and it is not necessary to arrange the water level control valve 24. However, a water pump 26 needs to be disposed at the water inlet pipe. In addition, a water level control ball valve 27 for controlling the on or off state of the water pump 26 is mounted at the water pump 26. Once the water level of the water inlet cavity 21 reaches a set upper limit value, a ball on the water level control ball valve 27 rises to turn off the water pump 26, so as to prevent the washing liquid of the water inlet cavity 21 from overflowing.

FIG. 5 shows a third structure of the filter unit 2. The filter unit 2 includes the water inlet cavity 21 and the water outlet cavity 23 that are in communication with each other. The water inlet cavity 21 is provided with the filter material 25. The filter unit 2 further includes a sealed container. The water inlet cavity 21 is disposed at an upper portion of the sealed container. The water outlet cavity 23 is disposed at a lower portion of the sealed container. The water pump 26 also needs to be disposed at the water inlet pipe. The water inlet cavity 21 includes a water storage chamber 211 in communication with the water inlet pipe and a filter material chamber 212 in communication with the water storage chamber 211. The filter material 25 is disposed in the filter material chamber 212. The filter material 25 includes at least one filter bag assembly. Each filter bag assembly includes a mesh basket and a filter bag disposed in the mesh basket. An outer surface of the filter bag is tightly attached to an inner wall of the mesh basket. An outer wall of the mesh basket is in communication with the water outlet cavity 23. A bottom wall of the water storage chamber 211 is provided with a fastening hole in which the mesh basket may be inserted. The top of the mesh basket is fixedly connected to the bottom wall of the water storage chamber 211. By using such cloth-bag filter, the top of the sealed container can be designed with an openable container cover, so that it is convenient to clean or replace the filter bag. The sealed container is further provided with a pressure gauge 28 that can detect the pressure inside the water storage chamber 211.

FIG. 6 shows a fourth structure of the filter unit 2, which is different from the third structure in that a different filter material 25 is used. The filter material 25 includes at least one filter element assembly. A water inlet of the filter element assembly is in communication with the water storage chamber 211. A water outlet of the filter element assembly is in communication with the water outlet cavity 23. Each filter element assembly includes a hollow sleeve and a filter element filled in the hollow sleeve. The filter element may be selected from various filter element structures such as a ceramic filter element, a glass fiber filter element, an activated carbon filter element, a textile fiber coil filter element, and a polypropylene melt-blown filter element.

In the present disclosure, the filter unit 2 filters washing liquid in the cylinder 12. The micro-nano bubble generator 7 introduces micro-nano bubbles into the filtered washing liquid. The washing liquid that contains the micro-nano bubbles passes through the dissolved air release assembly 3 to release a large number of micro-nano bubbles. The micro-nano bubbles then rise slowly and reach the surface of tableware. The tableware is cleaned by the shock waves generated as some micro-nano bubbles burst on the surface of the tableware. Some micro-nano bubbles can adsorb grease and carry the grease to rise to the surface of the washing liquid to turn the grease into floating oil. The washing liquid that contains residues and floating oil passes through the water inlet pipe and is introduced into the filter unit 2 again for filtration. In this way, a cyclic process of washing the tableware and filtering the washing liquid is completed, and washing liquid can be effectively filtered to remove residues and floating oil and the tableware can be cleaned.

Further, the dissolved air release assembly 3 includes an intercommunication pipe 32 in mutual communication and a dissolved air releaser 31 connected to the intercommunication pipe 32, so that the bottom wall of the inner cavity of the cylinder 12 may be preferably provided with a groove matching the dissolved air release assembly 3, so that the inner cavity of the cylinder 12 is flatter and neater. Referring to FIG. 7, the intercommunication pipe 32 includes three annular pipes with inner diameters sequentially increasing from inside to outside. The annular pipes are connected to each other by a plurality of connecting pipes. The annular pipes may be changed according to the shape of the cylinder of the dishwasher. Referring to FIG. 8, square annular pipes may be designed. Further, referring to FIG. 9 to FIG. 11, the dissolved air releaser 31 includes an inlet pipe 311 and an outlet pipe 312 connected to the inlet pipe 311, a conical entrance cavity is formed inside the inlet pipe 311, an exit cavity in communication with the entrance cavity is formed inside the outlet pipe 312, and a conical lug 313 is provided on an inner wall of the outlet pipe 312 at a position facing the entrance cavity. FIG. 10 shows the dissolved air releaser 31 with the first structure. Specifically, the outlet pipe 312 is designed into four branch pipes connected crosswise in British union jack form or eight-legged form. FIG. 1.1 shows the dissolved air releaser 31 with a second structure. The dissolved air releaser 31 shown in FIG. 10 is preferably used in the present disclosure. After the washing liquid that contains micro-nano bubbles passes through the inlet pipe 311 of the dissolved air releaser 31, the speed of the water flow increases, and the washing liquid flows to the outlet pipe 312 in British union jack form or eight-legged form through the conical lug 313, to release more and denser micro-nano bubbles.

In the first embodiment of the present disclosure, the dishwasher filter device further includes a rotation driving device for driving washing liquid to flow. The rotation driving device includes a first motor 51 disposed below the cylinder 12, a reducer 52 connected to the first motor 51 by a transmission mechanism, and an impeller 53 connected to an output end of the reducer 52. The impeller 53 is disposed between a bottom wall of the cylinder 12 and the dissolved air release assembly 3. The impeller 53 includes a first disk and a plurality of ribs disposed on the first disk. Each of the ribs has a ridge form or a propeller vane form and has a C shape or an S shape in a radial direction of the first disk. The plurality of the ribs are uniformly distributed in a circumferential direction of the first disk. The impeller 53 drives washing liquid to flow, so that more micro-nano bubbles can hit the tableware, thereby greatly improving the cleaning effect.

FIG. 2 shows a second embodiment of the present disclosure, which is different from the first embodiment in that no rotation driving device is used. Instead, a vibration drive device drives a dish rack 13 immersed in washing liquid to reciprocate linearly. The vibration drive device includes a second motor 61 and a sine mechanism that are mounted outside a side wall of the cylinder 12. The sine mechanism includes a second disk mounted on an output shaft of the second motor 61, a lug disposed at the edge of the second disk, a shift fork 62 with an opening groove sheathed on the lug, and a horizontal transmission rod 63 vertically connected to the shift fork 62. The horizontal transmission rod 63 is connected to the dish rack 13 by a plurality of vertical rods 64. A pair of support bases 65 are symmetrically disposed on an upper portion of the side wall of the cylinder 12. Each support base 65 is provided with a bearing hole. The horizontal transmission rod 63 passes through the bearing holes and is freely slidable in the bearing holes. By using such vibration-type dish rack 13, more bubbles hit the tableware as the tableware moves with the dish rack 13, so that the cleaning effect can be greatly improved.

The implementations of the present disclosure are described above in detail with reference to the accompanying drawings. However, the present disclosure is not limited to the foregoing implementations. Within the knowledge of an ordinary skilled in the art, various modifications may further be made without departing from the concept of the present disclosure. 

1. A dishwasher filter device based on micro-nano aeration, comprising a cylinder for accommodating washing liquid and a filter unit, wherein the filter unit is in communication with an inner cavity of the cylinder by a water inlet pipe, the filter unit is connected to a micro-nano bubble generator by a third pipe, the micro-nano bubble generator is connected to a water outlet unit, the water outlet unit comprises a fourth pipe connected to the micro-nano bubble generator and a dissolved air release assembly connected to the other end of the fourth pipe, and the dissolved air release assembly is disposed at a bottom of the cylinder.
 2. The dishwasher filter device based on micro-nano aeration according to claim 1, wherein the filter unit comprises a water inlet cavity and a water outlet cavity that are in communication with each other, and the water inlet cavity is provided with a filter material.
 3. The dishwasher filter device based on micro-nano aeration according to claim 2, wherein the filter unit further comprises a filter tank with an open upper end, the water inlet cavity and the water outlet cavity are disposed in the filter tank, and the filter material comprises a coarse filter screen and a fine filter screen located below the coarse filter screen.
 4. The dishwasher filter device based on micro-nano aeration according to claim 3, wherein an oil-water separation tank is provided between the water inlet cavity and the water outlet cavity, an oil storage box is disposed in the oil-water separation tank, and an oil discharge valve is connected to the oil storage box.
 5. The dishwasher filter device based on micro-nano aeration according to claim 2, wherein the filter unit further comprises a sealed container, the water inlet cavity is disposed at an upper portion of the sealed container, the water outlet cavity is disposed at a lower portion of the sealed container, and the water inlet cavity comprises a water storage chamber in communication with the water inlet pipe and a filter material chamber in communication with the water storage chamber.
 6. The dishwasher filter device based on micro-nano aeration according to claim 1, wherein the micro-nano bubble generator comprises an air buffer tank, an air-liquid mixing pump connected to the water inlet pipe, and a jet device connected to a water outlet of the air-liquid mixing pump, the air buffer tank is respectively connected to an air inlet of the air-liquid mixing pump and an air inlet of the jet device, and a water outlet of the jet device is connected to the water outlet unit.
 7. The dishwasher filter device based on micro-nano aeration according to claim 6, wherein the dissolved air release assembly comprises an intercommunication pipe in mutual communication and a dissolved air releaser connected to the intercommunication pipe, the dissolved air releaser comprises an inlet pipe and an outlet pipe connected to the inlet pipe, a conical entrance cavity is formed inside the inlet pipe, an exit cavity in communication with the entrance cavity is formed inside the outlet pipe, and a conical lug is provided on an inner wall of the outlet pipe at a position facing the entrance cavity.
 8. The dishwasher filter device based on micro-nano aeration according to claim 6, further comprising a rotation driving device for driving washing liquid to flow, wherein the rotation driving device comprises a first motor disposed below the cylinder, a reducer connected to the first motor by a transmission mechanism, and an impeller connected to an output end of the reducer, and the impeller is disposed between a bottom wall of the cylinder and the dissolved air release assembly.
 9. The dishwasher filter device based on micro-nano aeration according to claim 8, wherein the impeller comprises a first disk and a plurality of ribs disposed on the first disk, each of the ribs has a ridge form or a propeller vane form, and has a C shape or an S shape in a radial direction of the first disk, and the plurality of the ribs are uniformly distributed in the circumferential direction of the first disk.
 10. The dishwasher filter device based on micro-nano aeration according to claim 6, further comprising a dish rack immersed in washing liquid and a vibration drive device for driving the dish rack to reciprocate linearly, wherein the vibration drive device comprises a second motor and a sine mechanism that are mounted outside a side wall of the cylinder, the sine mechanism comprises a second disk mounted on an output shaft of the second motor, a lug disposed at an edge of the second disk, a shift fork with an opening groove sheathed on the lug, and a horizontal transmission rod vertically connected to the shift fork, and the horizontal transmission rod is connected to the dish rack by a plurality of vertical rods. 